/*

* Internal function/structure declaration. Do NOT include in your

* application.

*

*

* This file written by Ryan C. Gordon.

*/

#ifndef _INCLUDE_PHYSFS_INTERNAL_H_

#define _INCLUDE_PHYSFS_INTERNAL_H_

#ifndef __PHYSICSFS_INTERNAL__

#error Do not include this header from your applications.

#endif

#include "physfs.h"

/* The holy trinity. */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "physfs_platforms.h"

#include <assert.h>

#include <malloc.h>

#endif

#include <alloca.h>

#endif

#ifdef __cplusplus

extern "C" {

#endif

( ((__GNUC__ << 16) + __GNUC_MINOR__) >= (((major) << 16) + (minor)) )

#else

#endif

#ifdef __cplusplus

/* C++ always has a real inline keyword. */

#elif (defined macintosh) && !(defined __MWERKS__)

# define inline

#elif (defined _MSC_VER)

# define inline __inline

#endif

#define _FILE_OFFSET_BITS 64

#endif

/*

* Interface for small allocations. If you need a little scratch space for

* a throwaway buffer or string, use this. It will make small allocations

* on the stack if possible, and use allocator.Malloc() if they are too

* large. This helps reduce malloc pressure.

* There are some rules, though:

* NEVER return a pointer from this, as stack-allocated buffers go away

* when your function returns.

* NEVER allocate in a loop, as stack-allocated pointers will pile up. Call

* a function that uses smallAlloc from your loop, so the allocation can

* free each time.

* NEVER call smallAlloc with any complex expression (it's a macro that WILL

* have side effects...it references the argument multiple times). Use a

* variable or a literal.

* NEVER free a pointer from this with anything but smallFree. It will not

* be a valid pointer to the allocator, regardless of where the memory came

* from.

* NEVER realloc a pointer from this.

* NEVER forget to use smallFree: it may not be a pointer from the stack.

* NEVER forget to check for NULL...allocation can fail here, of course!

*/

void *__PHYSFS_initSmallAlloc(void *ptr, PHYSFS_uint64 len);

#define __PHYSFS_smallAlloc(bytes) ( \

__PHYSFS_initSmallAlloc( \

(((bytes) < __PHYSFS_SMALLALLOCTHRESHOLD) ? \

alloca((size_t)((bytes)+sizeof(void*))) : NULL), (bytes)) \

)

void __PHYSFS_smallFree(void *ptr);

/* Use the allocation hooks. */

#define malloc(x) Do not use malloc() directly.

#define realloc(x, y) Do not use realloc() directly.

#define free(x) Do not use free() directly.

#define DIR_ARCHIVE_DESCRIPTION "Non-archive, direct filesystem I/O"

#define GRP_ARCHIVE_DESCRIPTION "Build engine Groupfile format"

#define HOG_ARCHIVE_DESCRIPTION "Descent I/II HOG file format"

#define MVL_ARCHIVE_DESCRIPTION "Descent II Movielib format"

#define QPAK_ARCHIVE_DESCRIPTION "Quake I/II format"

#define ZIP_ARCHIVE_DESCRIPTION "PkZip/WinZip/Info-Zip compatible"

#define WAD_ARCHIVE_DESCRIPTION "DOOM engine format"

#define LZMA_ARCHIVE_DESCRIPTION "LZMA (7zip) format"

/* !!! FIXME: find something better than "dvoid" and "fvoid" ... */

/* Opaque data for file and dir handlers... */

typedef void dvoid;

/*

* DIRECTORY ROUTINES:

* These functions are for dir handles. Generate a handle with the

* openArchive() method, then pass it as the "opaque" dvoid to the

* others.

*

* Symlinks should always be followed (except in stat()); PhysicsFS will

* use the stat() method to check for symlinks and make a judgement on

* whether to continue to call other methods based on that.

* Open a dirhandle for dir/archive data provided by (io).

* (name) is a filename associated with (io), but doesn't necessarily

* map to anything, let alone a real filename. This possibly-

* meaningless name is in platform-dependent notation.

* (forWriting) is non-zero if this is to be used for

* the write directory, and zero if this is to be used for an

* element of the search path.

* Returns non-NULL on success. The pointer returned will be

* passed as the "opaque" parameter for later calls.

* List all files in (dirname). Each file is passed to (callback),

* where a copy is made if appropriate, so you should dispose of

* it properly upon return from the callback.

* You should omit symlinks if (omitSymLinks) is non-zero.

* If you have a failure, report as much as you can.

* (dirname) is in platform-independent notation.

void (*enumerateFiles)(dvoid *opaque,

const char *dirname,

int omitSymLinks,

PHYSFS_EnumFilesCallback callback,

const char *origdir,

/*

* If you can't handle multiple opens of the same file,

* you can opt to fail for the second call.

* Returns non-NULL on success. The pointer returned will be

* passed as the "opaque" parameter for later file calls.

*

* Regardless of success or failure, please set *fileExists to

* non-zero if the file existed (even if it's a broken symlink!),

* zero if it did not.

/*

* If the file does not exist, it should be created. If it exists,

* it should be truncated to zero bytes. The writing

* offset should be the start of the file.

* This filename is in platform-independent notation.

* If you can't handle multiple opens of the same file,

* you can opt to fail for the second call.

* Returns NULL on failure, and calls __PHYSFS_setError().

* Returns non-NULL on success. The pointer returned will be

* passed as the "opaque" parameter for later file calls.

/*

* If the file does not exist, it should be created. The writing

* offset should be the end of the file.

* This filename is in platform-independent notation.

* If you can't handle multiple opens of the same file,

* you can opt to fail for the second call.

* Returns NULL on failure, and calls __PHYSFS_setError().

* Returns non-NULL on success. The pointer returned will be

* passed as the "opaque" parameter for later file calls.

/*

* Delete a file in the archive/directory.

* Return non-zero on success, zero on failure.

* This filename is in platform-independent notation.

* This method may be NULL.

* On failure, call __PHYSFS_setError().

*/

/*

* Create a directory in the archive/directory.

* If the application is trying to make multiple dirs, PhysicsFS

* will split them up into multiple calls before passing them to

* your driver.

* Return non-zero on success, zero on failure.

* This filename is in platform-independent notation.

* This method may be NULL.

* On failure, call __PHYSFS_setError().

*/

* including the original PHYSFS_Io and (opaque) itself, if

* applicable. Implementation can assume that it won't be called if

* there are still files open from this archive.

void (*dirClose)(dvoid *opaque);

/*

* Obtain basic file metadata.

* Returns non-zero on success, zero on failure.

* On failure, call __PHYSFS_setError().

*/

int (*stat)(dvoid *opaque, const char *fn, int *exists, PHYSFS_Stat *stat);

/*

* Call this to set the message returned by PHYSFS_getLastError().

* Please only use the ERR_* constants above, or add new constants to the

* above group, but I want these all in one place.

*

* Calling this with a NULL argument is a safe no-op.

/* This byteorder stuff was lifted from SDL. http://www.libsdl.org/ */

#define PHYSFS_LIL_ENDIAN 1234

#define PHYSFS_BIG_ENDIAN 4321

(defined(__alpha__) || defined(__alpha)) || \

defined(__arm__) || defined(ARM) || \

(defined(__mips__) && defined(__MIPSEL__)) || \

defined(__SYMBIAN32__) || \

defined(__x86_64__) || \

defined(__LITTLE_ENDIAN__)

#define PHYSFS_BYTEORDER PHYSFS_LIL_ENDIAN

#else

#define PHYSFS_BYTEORDER PHYSFS_BIG_ENDIAN

#endif

/*

* When sorting the entries in an archive, we use a modified QuickSort.

* When there are less then PHYSFS_QUICKSORT_THRESHOLD entries left to sort,

* we switch over to a BubbleSort for the remainder. Tweak to taste.

*

* You can override this setting by defining PHYSFS_QUICKSORT_THRESHOLD

* before #including "physfs_internal.h".

*/

#ifndef PHYSFS_QUICKSORT_THRESHOLD

#define PHYSFS_QUICKSORT_THRESHOLD 4

#endif

/*

* Sort an array (or whatever) of (max) elements. This uses a mixture of

* a QuickSort and BubbleSort internally.

* (cmpfn) is used to determine ordering, and (swapfn) does the actual

* swapping of elements in the list.

*

* See zip.c for an example.

*/

void __PHYSFS_sort(void *entries, PHYSFS_uint32 max,

int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),

void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32));

/*

* This isn't a formal error code, it's just for BAIL_MACRO.

* It means: there was an error, but someone else already set it for us.

*/

#define ERRPASS PHYSFS_ERR_OK

#define BAIL_MACRO(e, r) do { if (e) __PHYSFS_setError(e); return r; } while (0)

#define BAIL_IF_MACRO(c, e, r) do { if (c) { if (e) __PHYSFS_setError(e); return r; } } while (0)

#define BAIL_MACRO_MUTEX(e, m, r) do { if (e) __PHYSFS_setError(e); __PHYSFS_platformReleaseMutex(m); return r; } while (0)

#define BAIL_IF_MACRO_MUTEX(c, e, m, r) do { if (c) { if (e) __PHYSFS_setError(e); __PHYSFS_platformReleaseMutex(m); return r; } } while (0)

#define GOTO_MACRO(e, g) do { if (e) __PHYSFS_setError(e); goto g; } while (0)

#define GOTO_IF_MACRO(c, e, g) do { if (c) { if (e) __PHYSFS_setError(e); goto g; } } while (0)

#define GOTO_MACRO_MUTEX(e, m, g) do { if (e) __PHYSFS_setError(e); __PHYSFS_platformReleaseMutex(m); goto g; } while (0)

#define GOTO_IF_MACRO_MUTEX(c, e, m, g) do { if (c) { if (e) __PHYSFS_setError(e); __PHYSFS_platformReleaseMutex(m); goto g; } } while (0)

#define __PHYSFS_ARRAYLEN(x) ( (sizeof (x)) / (sizeof (x[0])) )

#ifdef PHYSFS_NO_64BIT_SUPPORT

#define __PHYSFS_SI64(x) ((PHYSFS_sint64) (x))

#define __PHYSFS_UI64(x) ((PHYSFS_uint64) (x))

#elif (defined __GNUC__)

#define __PHYSFS_SI64(x) x##LL

#define __PHYSFS_UI64(x) x##ULL

#elif (defined _MSC_VER)

#define __PHYSFS_SI64(x) x##i64

#define __PHYSFS_UI64(x) x##ui64

#define __PHYSFS_SI64(x) ((PHYSFS_sint64) (x))

#define __PHYSFS_UI64(x) ((PHYSFS_uint64) (x))

#endif

/*

* Check if a ui64 will fit in the platform's address space.

* The initial sizeof check will optimize this macro out entirely on

* 64-bit (and larger?!) platforms, and the other condition will

* return zero or non-zero if the variable will fit in the platform's

* size_t, suitable to pass to malloc. This is kinda messy, but effective.

*/

#define __PHYSFS_ui64FitsAddressSpace(s) ( \

(sizeof (PHYSFS_uint64) <= sizeof (size_t)) || \

((s) < (__PHYSFS_UI64(0xFFFFFFFFFFFFFFFF) >> (64-(sizeof(size_t)*8)))) \

/*

* This is a strcasecmp() or stricmp() replacement that expects both strings

* to be in UTF-8 encoding. It will do "case folding" to decide if the

* Unicode codepoints in the strings match.

*

* It will report which string is "greater than" the other, but be aware that

* this doesn't necessarily mean anything: 'a' may be "less than" 'b', but

* a random Kanji codepoint has no meaningful alphabetically relationship to

* a Greek Lambda, but being able to assign a reliable "value" makes sorting

* algorithms possible, if not entirely sane. Most cases should treat the

* return value as "equal" or "not equal".

*/

int __PHYSFS_utf8strcasecmp(const char *s1, const char *s2);

/*

* This works like __PHYSFS_utf8strcasecmp(), but takes a character (NOT BYTE

* COUNT) argument, like strcasencmp().

*/

int __PHYSFS_utf8strnicmp(const char *s1, const char *s2, PHYSFS_uint32 l);

/*

* stricmp() that guarantees to only work with low ASCII. The C runtime

* stricmp() might try to apply a locale/codepage/etc, which we don't want.

*/

int __PHYSFS_stricmpASCII(const char *s1, const char *s2);

/*

* strnicmp() that guarantees to only work with low ASCII. The C runtime

* strnicmp() might try to apply a locale/codepage/etc, which we don't want.

*/

int __PHYSFS_strnicmpASCII(const char *s1, const char *s2, PHYSFS_uint32 l);

/* convenience macro to make this less cumbersome internally... */

#define allocator __PHYSFS_AllocatorHooks

/*

* Create a PHYSFS_Io for a file in the physical filesystem.

* This path is in platform-dependent notation. (mode) must be 'r', 'w', or

* 'a' for Read, Write, or Append.

*/

PHYSFS_Io *__PHYSFS_createNativeIo(const char *path, const int mode);

/*

* Create a PHYSFS_Io for a buffer of memory (READ-ONLY). If you already

* have one of these, just use its duplicate() method, and it'll increment

* its refcount without allocating a copy of the buffer.

*/

PHYSFS_Io *__PHYSFS_createMemoryIo(const void *buf, PHYSFS_uint64 len,

void (*destruct)(void *));

/*

* Read (len) bytes from (io) into (buf). Returns non-zero on success,

* zero on i/o error. Literally: "return (io->read(io, buf, len) == len);"

*/

int __PHYSFS_readAll(PHYSFS_Io *io, void *buf, const PHYSFS_uint64 len);

/* These are shared between some archivers. */

typedef struct

{

char name[32];

PHYSFS_uint32 startPos;

PHYSFS_uint32 size;

} UNPKentry;

void UNPK_dirClose(dvoid *opaque);

dvoid *UNPK_openArchive(PHYSFS_Io *io, UNPKentry *e, const PHYSFS_uint32 num);

void UNPK_enumerateFiles(dvoid *opaque, const char *dname,

int omitSymLinks, PHYSFS_EnumFilesCallback cb,

const char *origdir, void *callbackdata);

PHYSFS_Io *UNPK_openRead(dvoid *opaque, const char *fnm, int *fileExists);

PHYSFS_Io *UNPK_openWrite(dvoid *opaque, const char *name);

PHYSFS_Io *UNPK_openAppend(dvoid *opaque, const char *name);

int UNPK_remove(dvoid *opaque, const char *name);

int UNPK_mkdir(dvoid *opaque, const char *name);

int UNPK_stat(dvoid *opaque, const char *fn, int *exists, PHYSFS_Stat *stat);

/*--------------------------------------------------------------------------*/

/*--------------------------------------------------------------------------*/

/*------------ ----------------*/

/*------------ You MUST implement the following functions ----------------*/

/*------------ if porting to a new platform. ----------------*/

/*------------ ----------------*/

/*--------------------------------------------------------------------------*/

/*--------------------------------------------------------------------------*/

/*

* The dir separator; '/' on unix, '\\' on win32, ":" on MacOS, etc...

* Obviously, this isn't a function. If you need more than one char for this,

* you'll need to pull some old pieces of PhysicsFS out of revision control.

#define __PHYSFS_platformDirSeparator '\\'

#else

#define __PHYSFS_platformDirSeparator '/'

#endif

/*

* Initialize the platform. This is called when PHYSFS_init() is called from

*

* Return zero if there was a catastrophic failure (which prevents you from

* functioning at all), and non-zero otherwise.

*/

int __PHYSFS_platformInit(void);

/*

* Deinitialize the platform. This is called when PHYSFS_deinit() is called

* from the application. You can use this to clean up anything you've

* allocated in your platform driver.

*

* Return zero if there was a catastrophic failure (which prevents you from

* functioning at all), and non-zero otherwise.

*/

int __PHYSFS_platformDeinit(void);

/*

* Open a file for reading. (filename) is in platform-dependent notation. The

* file pointer should be positioned on the first byte of the file.

*

* The return value will be some platform-specific datatype that is opaque to

* the caller; it could be a (FILE *) under Unix, or a (HANDLE *) under win32.

*

* The same file can be opened for read multiple times, and each should have

* a unique file handle; this is frequently employed to prevent race

* conditions in the archivers.

*

* Call __PHYSFS_setError() and return (NULL) if the file can't be opened.

*/

void *__PHYSFS_platformOpenRead(const char *filename);

/*

* Open a file for writing. (filename) is in platform-dependent notation. If

* the file exists, it should be truncated to zero bytes, and if it doesn't

* exist, it should be created as a zero-byte file. The file pointer should

* be positioned on the first byte of the file.

*

* The return value will be some platform-specific datatype that is opaque to

* the caller; it could be a (FILE *) under Unix, or a (HANDLE *) under win32,

* etc.

*

* Opening a file for write multiple times has undefined results.

*

* Call __PHYSFS_setError() and return (NULL) if the file can't be opened.

*/

void *__PHYSFS_platformOpenWrite(const char *filename);

/*

* Open a file for appending. (filename) is in platform-dependent notation. If

* the file exists, the file pointer should be place just past the end of the

* file, so that the first write will be one byte after the current end of

* the file. If the file doesn't exist, it should be created as a zero-byte

* file. The file pointer should be positioned on the first byte of the file.

*

* The return value will be some platform-specific datatype that is opaque to

* the caller; it could be a (FILE *) under Unix, or a (HANDLE *) under win32,

* etc.

*

* Opening a file for append multiple times has undefined results.

*

* Call __PHYSFS_setError() and return (NULL) if the file can't be opened.

*/

void *__PHYSFS_platformOpenAppend(const char *filename);

/*

* Read more data from a platform-specific file handle. (opaque) should be

* cast to whatever data type your platform uses. Read a maximum of (len)

* 8-bit bytes to the area pointed to by (buf). If there isn't enough data

* available, return the number of bytes read, and position the file pointer

* immediately after those bytes.

* On success, return (len) and position the file pointer immediately past

* the end of the last read byte. Return (-1) if there is a catastrophic

* pointer should not move in such a case. A partial read is success; only

* return (-1) on total failure; presumably, the next read call after a

* partial read will fail as such.

/*

* Write more data to a platform-specific file handle. (opaque) should be

* cast to whatever data type your platform uses. Write a maximum of (len)

* 8-bit bytes from the area pointed to by (buffer). If there is a problem,

* return the number of bytes written, and position the file pointer

* immediately after those bytes. Return (-1) if there is a catastrophic

* error, and call __PHYSFS_setError() to describe the problem; the file

* pointer should not move in such a case. A partial write is success; only

* return (-1) on total failure; presumably, the next write call after a

* partial write will fail as such.

/*

* Set the file pointer to a new position. (opaque) should be cast to

* whatever data type your platform uses. (pos) specifies the number

* of 8-bit bytes to seek to from the start of the file. Seeking past the

* end of the file is an error condition, and you should check for it.

*

* Not all file types can seek; this is to be expected by the caller.

*

* On error, call __PHYSFS_setError() and return zero. On success, return

* a non-zero value.

*/

int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos);

/*

* Get the file pointer's position, in an 8-bit byte offset from the start of

* the file. (opaque) should be cast to whatever data type your platform

* uses.

*

* Not all file types can "tell"; this is to be expected by the caller.

*

*/

PHYSFS_sint64 __PHYSFS_platformTell(void *opaque);

/*

* Determine the current size of a file, in 8-bit bytes, from an open file.

*

* The caller expects that this information may not be available for all

* file types on all platforms.

*

* Return -1 if you can't do it, and call __PHYSFS_setError(). Otherwise,

* return the file length in 8-bit bytes.

*/

PHYSFS_sint64 __PHYSFS_platformFileLength(void *handle);

/*

* !!! FIXME: comment me.

*/

int __PHYSFS_platformStat(const char *fn, int *exists, PHYSFS_Stat *stat);

/*

* Flush any pending writes to disk. (opaque) should be cast to whatever data

* type your platform uses. Be sure to check for errors; the caller expects

* that this function can fail if there was a flushing error, etc.

*

* Return zero on failure, non-zero on success.

*/

int __PHYSFS_platformFlush(void *opaque);

/*

* Close file and deallocate resources. (opaque) should be cast to whatever

* data type your platform uses. This should close the file in any scenario:

* flushing is a separate function call, and this function should never fail.

* You should clean up all resources associated with (opaque); the pointer

* will be considered invalid after this call.

* Platform implementation of PHYSFS_getCdRomDirsCallback()...

* CD directories are discovered and reported to the callback one at a time.

* Pointers passed to the callback are assumed to be invalid to the

* application after the callback returns, so you can free them or whatever.

* Callback does not assume results will be sorted in any meaningful way.

/*

* Calculate the base dir, if your platform needs special consideration.

* Just return NULL if the standard routines will suffice. (see

* calculateBaseDir() in physfs.c ...)

* Caller will allocator.Free() the retval if it's not NULL. If it's NULL,

* the userdir will default to basedir/username.

/* This is the cached version from PHYSFS_init(). This is a fast call. */

const char *__PHYSFS_getUserDir(void); /* not deprecated internal version. */

/*

* Get the platform-specific pref dir. You must make sure the string ends

* with a dir separator.

* Caller will allocator.Free() the retval if it's not NULL. If it's NULL,

* it's a total failure. Caller will make missing directories if necessary;

* this just reports the final path.

*/

char *__PHYSFS_platformCalcPrefDir(const char *org, const char *app);

* Return a pointer that uniquely identifies the current thread.

* On a platform without threading, (0x1) will suffice. These numbers are

/*

* Enumerate a directory of files. This follows the rules for the

* uses platform-independent notation. Note that ".", "..", and other

* metaentries should always be ignored.